Fitness tracker



FIG. 1 is a perspective view of a fitness tracker showing our new design;

FIG. 2 is a front side view of FIG. 1;

FIG. 3 is a rear side view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is a right side view of FIG. 1;

FIG. 6 is a top plane view of FIG. 1; and,

FIG. 7 is a bottom plane view of FIG. 1. 

CLAIM The ornamental design for a fitness tracker, as shown and described. 